KR20000038634A - Device for eliminating noxious acidic gas in combustible gas - Google Patents
Device for eliminating noxious acidic gas in combustible gas Download PDFInfo
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- KR20000038634A KR20000038634A KR1019980053699A KR19980053699A KR20000038634A KR 20000038634 A KR20000038634 A KR 20000038634A KR 1019980053699 A KR1019980053699 A KR 1019980053699A KR 19980053699 A KR19980053699 A KR 19980053699A KR 20000038634 A KR20000038634 A KR 20000038634A
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- spray
- exhaust gas
- gas
- absorption tower
- weaning
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- 230000002378 acidificating effect Effects 0.000 title description 3
- 230000001473 noxious effect Effects 0.000 title description 2
- 239000007789 gas Substances 0.000 claims abstract description 94
- 239000007921 spray Substances 0.000 claims abstract description 52
- 238000010521 absorption reaction Methods 0.000 claims abstract description 47
- 238000001694 spray drying Methods 0.000 claims abstract description 47
- 239000002253 acid Substances 0.000 claims abstract description 14
- 238000002485 combustion reaction Methods 0.000 claims abstract description 11
- 239000000567 combustion gas Substances 0.000 claims abstract description 3
- 239000007795 chemical reaction product Substances 0.000 claims description 15
- 239000002002 slurry Substances 0.000 abstract description 22
- 239000002250 absorbent Substances 0.000 abstract description 21
- 230000002745 absorbent Effects 0.000 abstract description 21
- 238000000034 method Methods 0.000 abstract description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 14
- 239000003546 flue gas Substances 0.000 abstract description 14
- 239000007788 liquid Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 7
- 238000007796 conventional method Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 239000002803 fossil fuel Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 238000010248 power generation Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 13
- 239000006096 absorbing agent Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000005507 spraying Methods 0.000 description 5
- 239000003513 alkali Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007130 inorganic reaction Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 229910021654 trace metal Inorganic materials 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/263—Drying gases or vapours by absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
본 발명은 연소가스 중의 유해산성가스 제거장치에 관한 것으로서, 발전 또는 냉온방설비 플랜트내에 설치되는 보일러나 버너로부터 배출되는 화석연료 연소 후의 배기가스에 포함된 산성가스 등 공해물질을 제거하는 이유체식 분무노즐을 사용한 분무건조흡수탑에 있어, 종래에는 상기 버너 배가스 출구에 연결된 배기가스 입구덕트를 통해 배기가스를 분무건조흡수탑 본체내로 투입시키기 전에 다공정류판을 거치게하여 균일한 흐름이 되도록 하고 본체내부에서 이유체식 분무노즐를 통해 분무되는 흡수제와 반응케하였으나, 플랜트의 부하변동에 대처하는데 미흡하고 여분의 흡수제슬러리가 분무되어야 요구되는 유해가스 처리효율이 얻어지므로 경제적이지 못하며 유지보수면에 있어서도 불리한 문제점이 있는데 비해, 본 발명에서는 상기 다공정류판 대신 가변선회베인 및 베인조절기를 설치하여 플랜트부하변동에 유동적으로 대처할 수 있도록 하였고 배가스에 선회류를 가하고 이유체식분무노즐로부터의 분무액적에도 선회되어서 분무되도록하며 배가스와 분무액적의 선회방향이 서로 반대로 되도록하여 기액접촉효율을 극대화하도록 하는 등의 구성으로 되어 있어, 종래에 비해 상대적으로 적은 흡수제슬러리로도 유해가스 처리효율을 높이고 운용면에서의 신뢰도를 높이며 경제적인 탁월한 효과가 있는 분무건조흡수탑을 제공한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing harmful acid gas in combustion gas, and is a weaning spray for removing pollutants such as acid gas contained in exhaust gas after combustion of fossil fuel discharged from a boiler or a burner installed in a power generation or cooling / heating facility plant. In the spray drying absorption tower using a nozzle, conventionally, through the multi-flow flow plate through the exhaust gas inlet duct connected to the burner exhaust gas outlet through the multi-process flow plate to ensure uniform flow and inside the body Although it reacts with the absorbent sprayed through the weaning type spray nozzle, it is not economical because it is insufficient to cope with the load fluctuation of the plant and the required absorbent slurry is sprayed to obtain the harmful gas treatment efficiency, which is disadvantageous in terms of maintenance. In contrast, in the present invention the above Variable turning vanes and vane regulators are installed in place of the rectifying plate to be able to respond flexibly to plant load fluctuations, apply swirl flow to the flue gas, turn to spray on the spray droplets from the weaning spray nozzles, and rotate the direction of flue gas and spray droplets. It is designed to maximize the gas-liquid contact efficiency by making them opposite to each other, and the spray drying with the economical effect and the economical superior effect can be achieved even with the relatively low absorbent slurry compared to the conventional method, improving the efficiency of harmful gas. Provide an absorption tower.
Description
본 발명은 연소가스 중의 유해산성가스 제거장치에 관한 것으로, 보일러나 소각로 등의 연소장치에서 발생하는 연소배가스 중의 공해물질인 산성가스(SO2,HClThe present invention relates to a device for removing harmful acid gas in combustion gas, and is an acid gas (SO 2, HCl) in the combustion flue gas generated in a combustion device such as a boiler or an incinerator.
등)을 저감하는데 있어서 흡수제슬러리를 분무하여 반응생성물을 건조고형물로서 회수하는 반건식 분무건조흡수탑 장치 중 특히 분무노즐로서 이유체식 분무노즐을 사용하는 장치에 관한 것으로서, 배가스와 미세분무액적과의 양호한 기액접촉이 되도록 분무건조흡수탑 상부의 배가스 연결덕트 내에 배기가스에 선회류를 발생시키는 가변선회베인을 설치하여 배가스를 선회시켜 분무건조흡수탑본체로 유입시키고 분무건조흡수탑 상부에 설치되는 이유체식 분무노즐의 분사방향을 선회류와 반대방향으로하여 흡수제슬러리를 분사하므로서 배기가스와 분무액적과의 기액접촉효율을 향상시키며 또한 선회조절기에 의해 플랜트의 부하에 관계없이 최적의 혼합이 될 수 있도록 조절하므로서 높은 제거효율을 얻을 수 있도록 발명한 것이다.Etc.) in the semi-dry spray drying absorption tower apparatus which sprays the absorbent slurry to recover the reaction product as a dry solid, in particular, the apparatus using the wet-body spray nozzle as the spray nozzle, Variable turning vane for generating swirl flow in the exhaust gas in the exhaust gas connection duct in the upper part of the spray drying absorption tower for gas-liquid contact, turning the exhaust gas into the spray drying absorption tower body, and installed in the upper part of the spray drying absorption tower The spray nozzle is sprayed in the opposite direction to the swirling flow to improve the gas-liquid contact efficiency between the exhaust gas and the spray droplets, and the swirling regulator adjusts to achieve optimum mixing regardless of the load of the plant. Invented so as to obtain a high removal efficiency.
보일러 또는 소각로 등에서 연소에 의하여 발생하는 연소배기가스 중에는 산성가스(SO2, HCl등)을 포함한 각종의 유해성분이 함유되어 있다.The combustion exhaust gas generated by combustion in a boiler or incinerator contains various harmful components including acid gas (SO 2, HCl, etc.).
현재 이러한 산업시설에서 배출되는 배기가스는 지구온난화와 기상이변에 적지 않은 영향을 끼치는 것으로서 국제회의를 통해 각국의 배출한도목표를 설정하여 이를 의무화하거나 배출할 수 있는 권리 즉, 배출권이라는 명목하에 비지니스화하는 있는 실정으로 장래 이를 본격적으로 산업화하려는 움직임과 함께 관심이 높아지고 있다.At present, the exhaust gas emitted from these industrial facilities has a significant effect on global warming and extreme weather, and is commercialized in the name of emission rights, that is, the right to mandate or discharge the emission limit targets of each country through international conferences. In the future, interest is increasing along with the movement to industrialize it in earnest in the future.
산업활동을 유지하면서 이러한 유해가스 생성을 억제하기 위해 여러 가지 방법이 강구되고 있는데, 연료의 고급화를 통한 효율향상방안이나 연소후 배기가스 처리방법이 있으며, 그중에서 현실적이면서 비용이 저렴한 연소후 처리방법이 널리 적용되고 있다.Various methods have been devised to suppress the generation of harmful gases while maintaining industrial activities, and there are methods for improving efficiency through advanced fuel and treating exhaust gases after combustion, among which, realistic and inexpensive post combustion treatment methods. This is widely applied.
이 연소후처리방법에는 일반적으로 배기가스와 흡수제와의 반응상태에 따라 습식법, 건식법 및 반건식법으로 분류되며 현재까지 수십가지의 공정이 개발되어 있다.This post-combustion treatment method is generally classified into a wet method, a dry method, and a semi-dry method according to the reaction state between the exhaust gas and the absorbent, and dozens of processes have been developed to date.
상기 습식법은 배기가스 중의 산성가스를 알칼리 흡수제의 용액 또는 슬러리와 기액접촉시켜 유해가스를 흡수제거하여 반응생성물을 슬러리 또는 용액상으로 회수하게 되는데, 이 경우에는 배기가스와 흡수제와의 반응속도가 빨라 제거효율이 우수하지만 제거설비에서 배출되는 가스가 포화수분상태이므로 그냥 대기로 방출될 경우 백연현상을 일으키게 되므로 출구가스를 재가열하여 백연방지를 위한 설비가 필요하게 되며, 포화수분상태의 출구가스에 포함된 미량의 유해가스에 의한 장비의 부식을 방지하기 위하여 제거설비 후단의 부식방지대책이 필요하며, 또한 회수되는 반응생성물을 포함한 슬러리 중에는 배기가스에 포함된 각종 미량의 중금속 성분이 함유되게 되어 이를 제거하기 위한 폐수처리설비등이 필요하게 된다.In the wet method, the acid gas in the exhaust gas is brought into gas-liquid contact with a solution or slurry of an alkali absorber to absorb and remove harmful gases, thereby recovering the reaction product as a slurry or solution. In this case, the reaction rate between the exhaust gas and the absorbent is rapidly removed. Although the efficiency is excellent, the gas discharged from the removal equipment is saturated water, so if it is just released into the atmosphere, it will cause smoke phenomenon. Therefore, it is necessary to reheat the outlet gas to prevent smoke. In order to prevent the equipment from being corroded by trace amount of harmful gas, it is necessary to prevent corrosion at the back of the removal equipment.In addition, the slurry containing the recovered reaction products contains various trace metal components contained in the exhaust gas. Wastewater treatment facilities are needed.
상기 건식법은 산성가스를 함유한 배기가스를 촉매나 활성탄 등의 고체분말층을 통과시켜 제거하는 것으로서 가스의 제거반응에 따른 배기가스온도저하 등의 문제는 없지만 가스와의 반응이 고체와 기체의 반응이므로 반응속도가 느려 제거효율이 낮게되고 부하변동에 대한 적응력이 떨어지게 되는 등의 문제가 있다.The dry method removes the exhaust gas containing acidic gas through a solid powder layer such as a catalyst or activated carbon, and does not have a problem such as a decrease in exhaust gas temperature due to the gas removal reaction. Therefore, there is a problem that the reaction rate is low, the removal efficiency is low, and the adaptability to load fluctuation is reduced.
상기 반건식법은 배기가스를 분무건조흡수탑으로 유입하여 알칼리흡수제의 용액 또는 슬러리를 분무노즐에 이용하여 미세액적으로 분무하여 배기가스와 분무된 알칼리 흡수제의 분무액적과의 기액접촉에 따라 유해산성가스를 흡수제거하게 되며 반응생성물은 배기가스가 보유한 열에 의해 건조되어 고체고형물로서 회수되게 된다.In the semi-dry method, the exhaust gas is introduced into the spray-drying absorption tower, and the solution or slurry of the alkali absorber is sprayed into the microdroplets using the spray nozzle to produce harmful acid according to the gas-liquid contact between the exhaust gas and the spray droplet of the sprayed alkali absorbent. The gas is absorbed and removed, and the reaction product is dried by heat retained by the exhaust gas and recovered as a solid solid.
반건식법은 분무건조흡수탑에서 배출되는 가스의 온도가 포화온도 이상으로 배츨되므로서 백연현상을 일으키지 않고 후단장비에 대한 부식문제도 없게 된다.In the semi-dry method, the temperature of the gas discharged from the spray-drying absorption tower is discharged above the saturation temperature, so that it does not cause white smoke and there is no corrosion problem in the post equipment.
또한 회수되는 반응생성물이 고체상태로 회수되므로서 폐수처리설비가 불필요하게 되며 배기가스와 흡수제와의 반응이 기액반응이므로 반응효율도 우수한 장점을 갖고 있다.In addition, since the recovered reaction product is recovered in a solid state, the wastewater treatment facility is unnecessary, and the reaction efficiency is also excellent because the reaction between the exhaust gas and the absorbent is a gas-liquid reaction.
도 3은 종래의 이유체식 분무노즐을 사용하는 분무건조흡수탑 장치의 예를 나타낸 것이다. 분무건조흡수탑 본체(4')에는 버너 또는 보일러의 배가스 출구와 연결되는 배기가스 입구덕트(1')와, 분무건조흡수탑의 반응기에 유입되는 배가스의 흐름을 조절하는 다공정류판(2)과, 흡수제슬러리를 분사하는 이유체식 분무노즐(3')과, 배가스와 흡수제슬러리의 반응생성물을 배출하는 반응기저부의 반응생성물배출구(5)와, 반응후 남은 배가스가 배출되는 배기가스 출구덕트(6) 등으로 구성된다.Figure 3 shows an example of a spray drying absorption tower device using a conventional weaning type spray nozzle. The spray-drying absorption tower body 4 'includes an exhaust gas inlet duct 1' connected to the exhaust gas outlet of the burner or boiler and a multi-process flow plate for controlling the flow of exhaust gas flowing into the reactor of the spray-drying absorption tower. And a weaning spray nozzle 3 'for spraying the absorber slurry, a reaction product outlet 5 at the bottom of the reactor for discharging the reaction product of the exhaust gas and the absorber slurry, and an exhaust gas outlet duct for exhausting the remaining exhaust gas after the reaction ( 6) and the like.
상기 이유체식 분무노즐은 다수의 분무노즐이 분무건조흡수탑본체 상부에 등간격으로 설치되는데 흡수제슬러리 공급장치에서 주로 소석회 등의 흡수제슬러리와 압축공기 등의 분무매체가 함께 공급되어 이유체식 분무노즐(3')에 의해서 미세분무액적으로서 분무건조흡수탑 본체(4')내로 분무된다.The weaning type spray nozzle is a plurality of spray nozzles are installed at equal intervals on the top of the spray-drying absorption tower body, the absorber slurry supply device is mainly supplied with an absorbent slurry such as slaked lime and a spray medium, such as compressed air, weaning type spray nozzle ( 3 ') is sprayed into the spray drying absorption tower body 4' as a fine spray droplet.
한편, 보일러, 소각설비 등의 연소장치에서 배출되는 유해산성가스를 함유한 배기가스는, 배기가스 입구덕트(1')와 다공정류판(2)을 통하여 유입되어 분무건조흡수탑내에서 알칼리성의 흡수제와 반응하여 유해산성가스가 제거된 후에 나머지는 배기가스 출구덕트(6)를 통해 배출되게 된다.On the other hand, the exhaust gas containing harmful acid gas discharged from a combustion device such as a boiler or an incineration plant is introduced through the exhaust gas inlet duct 1 'and the multi-process flow plate 2 to absorb the alkaline absorbent in the spray drying absorption tower. After the harmful acid gas is removed in response to the reaction, the remainder is discharged through the exhaust gas outlet duct (6).
그리고, 배기가스와 흡수제슬러리의 미세분무액적은 서로 혼합되어 분무건조흡수탑 본체를 따라 아래로 강하하면서 반응하게 된다. 이 때 배기가스 중의 유해산성가스는 흡수제슬러리의 미세분무액적과 기액접촉반응을 통해 흡수제거되며 흡수제슬러리 분무액적 중의 물은 배기가스가 보유한 열에 의해 완전히 증발되며, 유해산성가스와 흡수제의 반응에 의해 생긴 반응부산물은 건조고형물로서 반응생성물 배출구(5)를 통해 배출되며 일부는 배기가스에 실려 배기가스 출구덕트(6)를 통해 도면에 표시되어 있지 않은 후단의 집진장치에서 제거된다.Then, the fine spray droplets of the exhaust gas and the absorbent slurry are mixed with each other and react with each other while descending down along the spray-drying absorption tower body. At this time, the harmful acid gas in the exhaust gas is absorbed and removed through the microspray droplets of the absorbent slurry and the gas-liquid contact reaction, and the water in the absorbent slurry spray droplets is completely evaporated by the heat retained by the exhaust gas. The reaction by-products generated are discharged through the reaction product outlet 5 as dry solids, and some of them are carried in the exhaust gas and are removed from the dust collector of the rear stage not shown in the drawing through the exhaust gas outlet duct 6.
상기 이유체식 분무노즐로부터 분무되는 소석회를 주로한 흡수제슬러리의 유량은 배가스의 유량이나 배가스 중의 유해산성가스 농도 및 요구되는 제거효율에 따라 결정된다. 상기 유해산성가스의 제거효율은 배기가스와 분무액적과의 반응면적 및 반응시간이 많으면 좋아지게 된다.The flow rate of the absorbent slurry mainly containing slaked lime sprayed from the weaning body spray nozzle is determined according to the flow rate of the flue gas, the concentration of harmful acid gas in the flue gas, and the required removal efficiency. The removal efficiency of the noxious acid gas is improved if the reaction area and reaction time of the exhaust gas and the spray droplets are large.
그러나 종래 기술에서의 상기 다공정류판(2)은 배가스를 균일유동 형태로 만들기 때문에 이유체식 분무노즐(3')에서 분무되는 슬러리 분무액적과 높은 혼합효율로 접촉케 하기 위해서는 다량의 흡수제슬러리를 공급해야만 장치에서 요구되는 유해가스 제거효율에 도달할 수 있으며, 그렇다고 하더라도 최대의 기액접촉 혼합효율을 얻기에는 한계가 있고, 또한 여분의 분무액적이 분무건조흡수탑 본체에 체적하면서 채 증발되지 않은 수분으로 인해 후단의 여과집진기에 슬러리상의 흡수제가 엉겨붙어 여포를 막는 등의 문제를 일으키고 나아가서는 분무건조흡수탑의 운전이 정지될 수 있는 소지가 있다.However, since the multi-process flow plate 2 in the prior art makes the flue gas into a uniform flow form, a large amount of absorbent slurry is supplied in order to contact the slurry spray droplets sprayed from the weaning type spray nozzle 3 'with high mixing efficiency. It is only possible to reach the toxic gas removal efficiency required by the device. However, there is a limit in obtaining the maximum gas-liquid contact mixing efficiency. Also, the excess spray liquid volume is accumulated in the spray-drying absorption tower body, and the water is not evaporated. This causes problems such as clogging of the follicle due to entanglement of the slurry absorbent in the filter bag at the rear end, and furthermore, there is a possibility that the operation of the spray drying absorption tower may be stopped.
상기와 같은 문제점을 해결하기 위해 안출된 본 발명은, 상기 분무건조흡수탑 본체내로 배가스가 유입될 때 배가스가 선회하도록 하고 선회되는 정도도 배가스의 유량 및 유속에 상응하도록 각도를 조절하여 버너나 보일러의 운전부하에 영향을 받지 않고 일정한 유해가스 제거효율을 얻을 수 있으며, 배가스의 선회방향과 반대방향으로 분무액적이 분사되도록하여 최대의 기액접촉혼합효율을 얻을 수 있으며 여분의 분무액적을 분사할 필요가 없으므로 이로 인한 고장이 미연에 방지되어 운용면에서도 경제적인 분무건조흡수탑의 제공을 그 목적으로 한다.In order to solve the above problems, the present invention, when the exhaust gas is introduced into the spray-drying absorption tower body so that the exhaust gas is rotated and the degree of rotation is also adjusted to the angle and the burner or boiler corresponding to the flow rate and flow rate of the exhaust gas It is possible to obtain a constant toxic gas removal efficiency without being affected by the operating load of the gas, and to achieve the maximum gas-liquid contact mixing efficiency by spraying the spray droplets in the opposite direction to the swirling direction of the exhaust gas. Its purpose is to provide an economical spray-drying absorption tower in terms of operation because it is prevented in advance.
이와 같은 목적은, 플랜트의 배기가스가 분무건조흡수탑으로 유입되는 관문인 연결덕트의 내에 설치된 가변선회베인과 가변선회베인의 각도를 조절하는 베인조절기와 가변선회베인의 중심에 부착되어 배가스의 유동형상을 환상으로 만들도록 원추형태로 된 지지대와 분무건조흡수탑의 상부측벽에 부착되고 배가스의 선회방향의 반대가 되도록 분무액적이 분무되는 이유체식분무노즐과 분무건조흡수탑 저부에 수평으로 부착되는 배기가스 출구덕트와 역시 분무건조흡수탑 최저부에 설치되는 반응생성물배출구로 구성된 본 발명에 의해 달성될 수 있는 바, 이하 첨부된 도면을 참고로 상세히 설명한다.For this purpose, the flue gas flow is attached to the center of the vane regulator and the variable swing vane, which controls the angle of the variable swing vane and the variable swing vane installed in the connection duct, which is the gateway through which the plant's exhaust gas flows into the spray drying absorption tower. It is attached to the support in the form of a cone and the upper side wall of the spray drying absorption tower to make the shape annular and horizontally attached to the bottom of the body spray nozzle and the spray drying absorption tower so that the spray droplets are sprayed so as to be in the reverse direction of the flue gas. It can be achieved by the present invention consisting of an exhaust gas outlet duct and a reaction product outlet which is also installed at the bottom of the spray drying absorption tower, which will be described in detail with reference to the accompanying drawings.
도 1은 본 발명의 분무건조흡수탑을 나타낸 부분측단면도.1 is a partial side cross-sectional view showing a spray drying absorption tower of the present invention.
도 2는 본 발명에서 이유체식 분무노즐로부터의 분무액적과 배가스 선회류의 상대적인 작용양상을 나타낸 분무건조흡수탑의 정단면도.Figure 2 is a front sectional view of the spray drying absorption tower showing the relative effect of the spray droplets and flue gas swirl flow from the weaning body spray nozzle in the present invention.
도 3은 종래 분무건조흡수탑을 나타낸 개략 측단면도.Figure 3 is a schematic side cross-sectional view showing a conventional spray drying absorption tower.
*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
1. 배기가스 입구덕트 2. 다공정류판1. Exhaust gas inlet duct 2. Multi process flow plate
3. 이유체식 분무노즐 4. 분무건조흡수탑 본체3. Weaning spray nozzle 4. Spray drying absorption tower body
5. 반응생성물 배출구 6. 배기가스 출구덕트5. Reaction product outlet 6. Exhaust gas outlet duct
7. 연결덕트 8. 가변선회베인7. Connection duct 8. Variable swing vane
9. 지지대 10. 베인조절기9. Support 10. Vane adjuster
도 1은 본 발명의 분무건조흡수탑을 나타낸 부분측단면도이다.1 is a partial side cross-sectional view showing a spray drying absorption tower of the present invention.
본 발명은, 보일러나 화로로부터의 배기가스 출구에 연결되는 배기가스 입구덕트(1)와 분무건조흡수탑 사이를 이루는 연결덕트(7)와, 상기 연결덕트(7)에 설치된 가변선회베인(8)과, 상기 가변선회베인(8)의 각도를 조절하는 베인조절기(10)와, 상기 가변선회베인(8)의 중심에 부착되어 배가스의 유동형상을 환상으로 만들도록 원추형태로 된 지지대(9)와, 상기 분무건조흡수탑의 상부측벽에 부착되고 배가스의 선회방향의 반대가 되도록 분무액적이 분무되는 이유체식분무노즐(3)과, 분무건조흡수탑 저부에 수평으로 부착되는 배기가스 출구덕트(6)와, 분무건조흡수탑 최저부에 설치되는 반응생성물배출구(5)로 구성된다.The present invention provides a connection duct (7) formed between the exhaust gas inlet duct (1) connected to the exhaust gas outlet from a boiler or a furnace and a spray drying absorption tower, and a variable swing vane (8) provided at the connection duct (7). ), A vane regulator 10 for adjusting the angle of the variable swing vane 8, and a support 9 in the form of a cone attached to the center of the variable swing vane 8 to make the flow shape of the exhaust gas annular. ), A wet-body spray nozzle 3 attached to the upper side wall of the spray drying absorption tower and sprayed with the spray droplets so as to be opposite to the rotational direction of the exhaust gas, and an exhaust gas outlet duct horizontally attached to the bottom of the spray drying absorption tower. (6) and the reaction product outlet 5 provided at the lowest part of the spray drying absorption tower.
이하 본 발명의 작용에 관해 설명한다.Hereinafter will be described the operation of the present invention.
먼저, 본 발명의 특징은, 도 1에 나타낸 바와 같이, 플랜트의 연소장치로부터 발생한 배기가스는 분무건조흡수탑 상부에 설치된 배기가스 입구덕트(1)를 통해 수평으로 유입되어 연결덕트(7)를 통과하여 분무건조흡수탑(4) 본체로 들어가게 된다.First, the characteristics of the present invention, as shown in Figure 1, the exhaust gas generated from the combustion apparatus of the plant flows horizontally through the exhaust gas inlet duct 1 installed above the spray drying absorption tower to connect the connection duct (7) Pass through and enters the spray drying absorption tower (4) body.
배가스가 분무건조흡수탑 본체(4)에 유입되기 전에 연결덕트(7)의 가변선회베인(8)을 거치게 되는데, 가변선회베인(8)는, 상기 배기가스 입구덕트(1)에서 측정된 배가스의 유량 및 유속을 근거로 작동하는 베인조절기(10)에 의해 조절되며, 배가스의 유량 및 유속이 많고 빠를 때에는 가변선회베인(8)에서의 각도를 작게하여 배가스의 흐름에 약간의 선회만 가하고, 반면 배가스의 유량 및 유속이 낮게 검출되면 가변선회베인(8)에서의 각도를 크게하여 배가스 흐름에 많은 선회를 가하게 되는데, 이는 플랜트의 부하변동에 의한 분무건조흡수탑에서의 처리효율의 변동을 최소로 하기 위한 것이다.Before the exhaust gas flows into the spray drying absorption tower main body 4, the variable swing vane 8 of the connecting duct 7 is passed. The variable swing vane 8 is the exhaust gas measured by the exhaust gas inlet duct 1. It is controlled by the vane regulator 10 which operates on the basis of the flow rate and the flow rate of the exhaust gas. When the flow rate and the flow rate of the exhaust gas are high and fast, the angle at the variable swing vane 8 is reduced to apply only a slight turn to the flow of the exhaust gas. On the other hand, if the flow rate and flow rate of the flue gas are detected to be low, the angle in the variable swing vane 8 is increased to add a lot of turn to the flue gas flow, which minimizes the variation of the treatment efficiency in the spray drying absorption tower due to the load variation of the plant. It is to do.
또한, 상기 가변선회베인(8)의 중심부에는 측단면 형상이 원추형인 지지대(9)가 설치되어 배가스가 분무건조흡수탑 본체(4)에 유입되면서부터 주변으로 확산되는 형상 즉 환상을 이루도록 하였다.In addition, at the center of the variable swing vane (8) is provided with a support (9) having a conical shape in the cross-sectional side surface so that the exhaust gas flows into the spray drying absorption tower body (4) to form a shape that is diffused around.
상기 가변선회베인(8)의 기계적인 형상에 대해서 도시화하는 것을 생략하였지만 각 회전익은 연결되어 있고 상기 베인조절기(10)에 근접한 하나의 회전익의 단부를 베인조절기에 링크하였으며 베인조절기(10)는 리니어모터나 수평왕복이 가능한 통상의 기계적 구성으로서 형성한다.Although the illustration of the mechanical shape of the variable swing vane 8 is omitted, each rotor blade is connected and the end of one rotor blade adjacent to the vane regulator 10 is linked to the vane regulator and the vane regulator 10 is linear. It is formed as a conventional mechanical configuration capable of a motor or a horizontal reciprocating.
도 2는 본 발명에서 이유체식 분무노즐로부터의 분무액적과 배가스 선회류의 상대적인 작용양상을 나타낸 분무건조흡수탑의 정단면도이다.Figure 2 is a front sectional view of the spray drying absorption tower showing the relative action of the spray droplets and flue gas swirl flow from the weaning type spray nozzle in the present invention.
이어서 상기 분무건조흡수탑 본체(4)로 유입된 배가스는 상기 이유체식 분무노즐(3)로부터의 흡수제의 분무액적과 접촉하게 되고 반응을 일으키게 된다.Subsequently, the exhaust gas introduced into the spray drying absorption tower body 4 comes into contact with spray droplets of the absorbent from the weaning type spray nozzle 3 and causes a reaction.
상기 이유체식 분무노즐(3)은 외부의 흡수제슬러리 공급장치(도시하지 않음)에 연결되고 흡수제슬러리가 공급될 때 분무매체로서 압축공기도 같이 공급되어 이유체식 분무노즐(3)에서 슬러리화된 흡수제를 작은 액적으로 분무하는 것이 가능하게 된다.The weaning spray nozzle 3 is connected to an external absorbent slurry supply device (not shown), and when the absorbent slurry is supplied, compressed air is also supplied as a spraying medium so that the absorbent slurryed in the weaning spray nozzle 3 is supplied. It is possible to spray small droplets.
그런데 본 발명에서는 상기 이유체식 분무노즐(3)으로부터 분무액적이 분사될 때 선회하면서 분사되도록 하였고, 상기 가변선회베인(8)을 통과한 배가스의 선회방향을 분무액적의 선회방향과 반대로 되도록하여 분무액적과 배가스의 접촉을 보다 격렬하면서 골고루 접촉하도록하여, 기액접촉혼합효율을 높이도록 하였다.However, in the present invention, when the spray droplets are sprayed from the weaning type spray nozzle 3 is sprayed while turning, the spraying direction of the exhaust gas passing through the variable swing vane (8) is reversed to the spraying direction of the spray droplets to spray The contact between the droplets and the exhaust gas is more intense and evenly contacted to increase the gas-liquid contact mixing efficiency.
그 다음으로 배가스의 유해물질이 강한 산성을 띠는 산화물이 대부분인데 반해 분무액적은 알칼리성의 소석회가 이용되기 때문에 두 물질이 결합하면 중성무기질의 반응생성물이 형성되고 동시에 슬러리에 포함되었던 수분은 배가스의 잠열에 의해 증발되고 이로서 상기 반응생성물은 고형물질로 되면서 분무건조흡수탑 본체(4)저부의 반응생성물배출구(5)를 통해 배출되게 된다.Next, most of the harmful substances in the flue gas are highly acidic oxides, while alkaline droplets are used in the spray droplets. Therefore, when the two substances combine, a neutral inorganic reaction product is formed. The latent heat is evaporated, whereby the reaction product becomes a solid material and is discharged through the reaction product outlet 5 at the bottom of the spray-drying absorption tower body 4.
그리고, 유해산성물이 빠져나간 다음의 나머지 배가스는 분무건조흡수탑 본체(4) 저부 측벽에 장착된 배기가스 출구덕트(6)를 통해 배출되어 도면에 표시되지 않은 후단의 집진장치에서 제거된다Then, the remaining exhaust gas after the harmful acid is discharged is discharged through the exhaust gas outlet duct 6 mounted on the bottom side wall of the spray drying absorption tower body 4 and removed from the dust collector of the rear stage not shown in the drawing.
본 발명은 배기가스 입구덕트와 분무건조흡수탑 본체를 연결하는 연결덕트에 가변선회베인을 설치하여 배가스 흐름에 선회류를 조성하고 조성된 선회류 방향과는 반대로 흡수제슬러리를 이유체식 분무노즐로부터 선회하여 분사되도록 구성됨으로서 분무액적과의 기액접촉혼합효과를 향상시키고, 또한 플랜트의 부하변동으로 인해 버너 또는 보일러로부터의 배가스 유량에 변동이 생겼을 때에도 분무건조흡수탑 내에서의 유해가스 처리효율에 영향이 가지 않도록 베인조절기 및 가변선회베인을 통해 조절이 가능하여 제거성능이 향상되며 상대적으로 적은 흡수제슬러리의 사용으로도 높은 제거효율을 얻을 수 있으므로 운전비의 저감을 실현하는 등 탁월한 효과가 있다.According to the present invention, a variable swirl vane is installed in the connecting duct connecting the exhaust gas inlet duct and the spray-drying absorption tower body to form swirl flow in the exhaust gas flow, and the absorber slurry is rotated from the weaning type spray nozzle as opposed to the swirl flow direction. It is designed to be sprayed in order to improve the gas-liquid contact mixing effect with the spray droplets, and even when the flue gas flow rate from the burner or the boiler changes due to the load change of the plant, the effect on the harmful gas treatment efficiency in the spray drying absorption tower is not affected. It can be controlled through the vane regulator and variable turning vanes so that the removal performance is improved and high removal efficiency can be obtained even with the use of a relatively small absorbent slurry.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980053699A KR20000038634A (en) | 1998-12-08 | 1998-12-08 | Device for eliminating noxious acidic gas in combustible gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980053699A KR20000038634A (en) | 1998-12-08 | 1998-12-08 | Device for eliminating noxious acidic gas in combustible gas |
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| KR20000038634A true KR20000038634A (en) | 2000-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019980053699A Withdrawn KR20000038634A (en) | 1998-12-08 | 1998-12-08 | Device for eliminating noxious acidic gas in combustible gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116407924A (en) * | 2022-11-23 | 2023-07-11 | 苏州吴中综合能源有限公司 | An activated carbon cyclone flue gas uniform mixing and injection device |
| CN116637493A (en) * | 2023-05-22 | 2023-08-25 | 浙江福陆工程设计有限公司 | Hydrogen chloride recovery tank with purification function and use method |
-
1998
- 1998-12-08 KR KR1019980053699A patent/KR20000038634A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116407924A (en) * | 2022-11-23 | 2023-07-11 | 苏州吴中综合能源有限公司 | An activated carbon cyclone flue gas uniform mixing and injection device |
| CN116637493A (en) * | 2023-05-22 | 2023-08-25 | 浙江福陆工程设计有限公司 | Hydrogen chloride recovery tank with purification function and use method |
| CN116637493B (en) * | 2023-05-22 | 2023-12-05 | 浙江福陆工程设计有限公司 | Hydrogen chloride recovery tank with purification function and use method |
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